﻿<p><em>IfcSurfaceSide</em> is a denotion of whether negative, positive or both sides of a surface are being referenced.</p> 

<blockquote class="note">
NOTE&nbsp; Type adapted from <strong>surface_side</strong> defined in ISO10303-46.
</blockquote>

<blockquote class="history">
HISTORY&nbsp; New enumeration type in IFC2.0
</blockquote> 